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Although many vote-by-mail and provisional ballots have yet to be counted, Bay Area counties are projecting strong voter turnout for Tuesday's presidential election, however numbers are expected to be below those from the 2008 race.

In Alameda County, 78 percent of voters cast their ballots in 2008 when President Obama faced Arizona Sen. John McCain.

As of mid-afternoon today, voter turnout for this year's presidential race in that county was almost at 50 percent, but election officials anticipated that number to jump to about 70 percent.

The Santa Clara County Registrar of Voters has yet to release completed voter turnout information, but as of this afternoon the county counted 53 percent of registered voters had marked a ballot.

The 2008 election saw more than 85 percent voter turnout in that county.

With more than 35,000 vote-by-mail and provisional ballots left to count, Solano County was at a 56.9 percent turnout for this year's election.

Voters came out in droves in 2008, reaching nearly 85 percent turnout.

Marin County election officials said they are expecting anywhere from 80 to 85 percent turnout after all the vote-by-mail and provisional ballots are accounted for.

As of mid-afternoon, an election official said there about 46,000 more of those types of ballots to process with voter turnout standing at just more than 55 percent.

Voter turnout was high in 2008 at more than 90 percent, which a Sonoma County election official said this afternoon was a number unlikely to be reached in this election.

Sonoma County voters had high voter participation in the 2008 election with 93.4 percent casting a ballot. Unofficial results for this year have turnout at 68.2 percent.